Bump pip from 23.0.1 to 23.1 in /.github/workflows

Bumps [pip](https://github.com/pypa/pip) from 23.0.1 to 23.1.
- [Release notes](https://github.com/pypa/pip/releases)
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.0.1...23.1)

---
updated-dependencies:
- dependency-name: pip
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,4 +1,4 @@
-pip==23.0.1
+pip==23.1
 nox==2022.11.21
 nox-poetry==1.0.2
 poetry~=1.3.2